60results about How to "Achieve energy saving goals" patented technology

The invention discloses an energy-saving control system and an energy-saving control method for an automobile crane. The energy-saving control method comprises the following steps of: providing the flow required by a hydraulic system of the automobile crane through a handle and detecting the load pressure of the hydraulic system through a pressure sensor; calculating or searching the minimum value of oil consumption in unit time of the engine under the current load within the set change range of the current rotating speed by utilizing an energy-saving algorithm module; and adjusting the engine to rotate at a rotating speed corresponding to the minimum value of the oil consumption in unit time, and adjusting a variable displacement pump of the hydraulic system to have the displacement matched with the rotating speed. The invention also discloses an automobile crane with the energy-saving control system. In the invention, the handle directly corresponds to the flow of the hydraulic system, and the joint control of the rotating speed of the engine and the displacement of the variable displacement pump is realized.

The control apparatus comprises a vehicle detector located at the entrance of the tunnel or at the inside of the tunnel, and a switch and brightness controller set in the illuminating system. When there is no vehicle in the tunnel, the lamp at the entrance of the tunnel is opened, and the lamp at inside of tunnel is turn off and keeps in low brightness; when there is a vehicle passing through the detector of vehicle at entrance of tunnel, the trigger device will open all lamps in front of the vehicle. The apparatus uses induction coil type vehicle detectors, which are located at the entrance of tunnel, and is buried in the ground at each interval of 100-200m.

The invention provides a wireless control technology-based intelligent lighting system. The system comprises a plurality of lighting nodes and a main controller; the main controller can obtain surrounding ambient illuminance, determine a control instruction for adjusting lighting brightness according to the acquired ambient illuminance and send the control instruction to one or more lighting nodes in the plurality of lighting nodes, so that each lighting node can adjust its own lighting brightness according to the control instruction, and therefore, an energy-saving purpose can be achieved without affecting overall brightness; and the plurality of lighting nodes in the intelligent lighting system are provided with wireless communication modules, and the lighting nodes form a networked ad hoc network, and therefore, each lighting node can not only adjust its own lighting brightness according to the control instruction, but also can forward the received control instruction to lighting nodes in a range covered by the wireless signals of the lighting node, and thus, infinite cascaded connection can be realized, the limitations of the effective distance of a single node can be eliminated, and the infinite expansion of controlled lighting nodes can be realized.

The invention relates to the technical field of energy management, and discloses a building energy management system, which solves the problems of single management means, weak comprehensive management ability and insufficient intelligence in the traditional energy consumption supervision of buildings. The building energy management system includes an energy consumption collection module, an energy consumption database, an energy consumption alarm module, an area energy consumption management module, an area energy consumption management module, an energy prediction management module, an energy report module, a visualization module, and a system management module. The building energy management system is applicable to building energy management.

The embodiment of the invention provides an MPTCP congestion control method and device based on energy efficiency, and the method comprises the steps: for each sub-stream, determining the expected distribution proportion of a congestion window according to the round-trip time of the current transmission and a determined sub-flow rate distribution result with the maximum energy efficiency if confirmation information of the current transmission is received; and determining a second congestion window increment according to a difference value between the congestion window expected allocation proportion and the congestion window actual allocation proportion, updating the current congestion window value by combining with a first congestion window increment obtained based on an LIA algorithm, andusing the updated congestion window value for next data transmission. According to the method, adjustment of a congestion mechanism takes energy efficiency factors into consideration, part of data flow is transferred to a path with low energy consumption for transmission on the basis of guaranteeing throughput performance, the energy-saving target of equipment is achieved, and then energy consumption is remarkably reduced on the basis of guaranteeing the aggregation advantage of MPTCP.

The invention provides an energy consumption modeling and evaluation method for an energy consumption system. The method comprises the following steps of: constructing an energy consumption model forthe energy consumption system; analyzing the energy consumption model to obtain a unit product comprehensive energy consumption model; and evaluating the process and equipment energy consumption of the energy consumption system by utilizing the unit product comprehensive energy consumption model to obtain an evaluation result, and generating improvement suggestions for the process and equipment ofthe energy consumption system according to the evaluation result. According to the energy consumption modeling and evaluation method of the invention, the energy consumption model is analyzed, so that the unit product comprehensive energy consumption model is obtained; and evaluation is performed; the process and equipment of the energy consumption system are improved according to the evaluationresult; process optimization and energy-saving space evaluation can be guided; on the result of the prediction of the energy consumption model, the process can be optimized, guidance can be provided,and corresponding energy-saving measures can be formulated; and therefore, energy consumption can be decreased, and an energy-saving goal can be realized.

The invention discloses a citric acid-producing microorganism strain and a method for producing citric acid by fermenting starch sugar thereof. The strain is Aspergillus niger 101-HAC11 with an accession number of No. CGMCC No. 12480. At that same time, a culture medium formula and a fermentation process control process for producing citric acid by using starch sugar as carbon source are also disclosed. The yield of citric acid produced by the strain is 166.8 g / L. Compared with the prior art, the citric acid yield of the recombinant Aspergillus niger strain is 220.34 g / L, and the yield is increased by 32.10%. The method has the characteristics of high speed, simple production process, non-toxic residue and high safety.

A decorative heat-preserved wall board with solar and air heat collection is provided, which comprises a back board, a panel, a rim and an inner cavity. The back board is a shallow box-like heat-preservation sandwich board, an air inlet is provided at the lower part of the box bottom, an air outlet is provided at the upper part of the box bottom, at the air outlet, a solar fan is installed. The power supply of the fan is a solar photovoltaic power generating board at inner side at front of the panel. The panel is a flat glass. Between the panel and the back board, the rim is connected. On the rim, some concave ports for connecting are provided. In the inner cavity enclosed by the panel, back board and the rim, a corrugated heat-absorbing board is fixedly connected on the inner bottom side of the shallow box-like heat-preservation sandwich board. The outer surface of the corrugated heat-absorbing board is provided with a heat-absorbing coating. The inner wall of the corrugated heat-absorbing board is connected with heat-exchanging fins. The inside of the corrugated heat-absorbing board forms a heat-exchanging cavity, which is communicated with the air inlet and the air outlet. The invention greatly reduces the cost of the wall board integrating solar with a building, is easy to maintain, improves the service life and is easy to spread and apply in large area.

The invention provides a cloud platform deployment method. The method comprises: judging whether a physical host is overloaded or not by calculating the utilization rate of a resource; and emigrating a part of virtual machines in the overloaded physical host. The cloud platform deployment method reduces the consumption of energy by comprehensive consideration, ensures the quality of service, and realizes the energy-saving goal of a large-sized cloud platform.

The invention provides an integrated modular group control air compressor optimization system, and belongs to the field of air compression. The system comprises control managing equipment, master control equipment, field equipment, a network A, a network B and a compression air main pipe, the control managing equipment is connected with the master control equipment through the network A and the network B, the master control equipment is connected with the field equipment through the network A and the network B, the field equipment is connected with the compression air main pipe, an original air compressor system is integrated and modularized in a large-scale manner, the original air compressor system is optimized, the optimized air compressor system can achieve the energy saving target, the cost is reduced, unattended operation is achieved, the integrated modular group control air compressor optimization system has the quite small modification on the original air compressor system, theexpansibility is quite strong, and the system is suitable for modification of different air compressor systems.

The invention provides a renewable energy data center load management method and device. The renewable energy data center load management method comprises: S401, establishing a power consumption calculation model used for calculating a data center, and calculating power consumption; S402, establishing a power consumption management model for adjusting the management task of the data center; S403,establishing and using a temperature sensing model for sensing and calculating the environment temperature change of the data center, and on the premise that the maximum inlet temperature Tmax of a host of the data center is determined, determining the maximum power consumption needed by refrigeration of the host; wherein the data center comprises a plurality of hosts and a refrigerator; and S404,realizing load management control of the data center through the maximum power consumption and the resource and power consumption management control of the data center, and controlling the number ofactive hosts in each time interval of the data center to be active.

The invention discloses a method and a device for decoking the high-temperature heating surface of a supercritical tower boiler by using frequency-adjustable high-sound-intensity sound waves. The method comprises the step of carrying out decoking and ash removal on a high-temperature superheater and a high-temperature reheater of the supercritical tower boiler by employing the frequency-adjustable high-sound-intensity sound waves. The device comprises frequency-adjustable high-intensity sound sources arranged at the exterior of the high-temperature heating surface of the supercritical tower boiler, the high-temperature superheater arranged in the supercritical tower boiler, and sound transmission tubes located at the high-temperature reheater. The method is simple in process, and saves capital and manpower investment. Through a frequency-adjustable high-sound-intensity sound wave generation device, and the high-temperature superheater and the high-temperature reheater that are arranged on the high-temperature heating surface of the supercritical tower boiler, the coking problem of the high-temperature heating surface is solved, the potential safety hazards of the supercritical tower boiler are eliminated, the heat exchange efficiency of the heating surface is improved, and the purpose of energy conservation is realized.

The invention relates to an adjustable jet pump which comprises an upper connector, a pump body, a lower connector, a power liquid connector and a lower-pressure liquid connector. The adjustable jet pump is characterized by further comprising a bridge type channel movably connected between the pump body and the lower connector, two or more high-pressure flow channels and one low-pressure flow channel are formed in the bridge type channel in the axial direction, and nozzles different in size are arranged at the positions, at the outlet end of the bridge type channel, of the high-pressure flow channels. A valve rod is further arranged in the lower connector, one end of the valve rod is connected with a power liquid flow channel of the lower connector, and the other end of the valve rod is in contact with the end face of the bridge type channel in an abutting mode. One of the nozzles is communicated with an inlet of the pump body by rotating the bridge type channel, and meanwhile the inlet ends of the high-pressure flow channels where the nozzles are located are communicated with the valve rod. The inlet end of the low-pressure flow channel of the bridge type channel is communicated with a low-pressure liquid flow channel of the lower connector all the time. The adjustable jet pump can meet the requirement for the nozzle size in different conditions, the working procedure is simplified to a certain extent, and the working efficiency is improved.

The invention discloses a method for processing high-concentration ammonia nitrogen in rare earth wastewater. The method comprises the specific steps as follows: firstly, taking 100-mesh to 150-mesh granular active carbon for preparing an electrode with catalytic activity; secondly, filling the rare earth wastewater with the high-concentration ammonia nitrogen into an electrolytic tank; thirdly, adding a NaCl solid and electrolyzing for 3-4h at the voltage of 36-110V; and finally, reducing the concentration of the ammonia nitrogen in the discharged rare earth wastewater to be less than 0.2mg / L. According to the method, the concentration polarization of ion concentration in a surrounding solution is eliminated by the granular active carbon and the electrode with catalytic activity, so thatthe redox reaction is conducted to convert the high-concentration ammonia nitrogen in the rare earth wastewater into nitrogen, and the nitrogen is discharged into the air; the ammonia nitrogen removal rate is more than 99.8%; the voltage is low; the energy consumption is low; and the secondary pollution risk is avoided.

The invention discloses a power dynamic adjustment method and system for an LTE base station, and the method comprises the steps: 101, judging whether each LTE cell in the LTE base station meets an adjustable condition or not, and adding the LTE cell as a to-be-adjusted cell into a power adjustment cell list if the LTE cell in the LTE base station meets the adjustable condition; andp 102, in the set adjustable date and adjustable time, judging whether the to-be-adjusted cell in the power adjustment cell list is adjustable or not every other adjustment period, and if yes, performing power adjustment on the to-be-adjusted cell in the power adjustment cell list through the open wireless network optimization parameters, and if not, not adjusting, the wireless network optimization parameters including CRS reference signal power, PA, PB, the number of transmitting antennas, the number of CRS ports and carrier bandwidth. According to the method and the system provided by the invention, the transmitting power of the base station is reduced as much as possible by automatically combining and setting the open network optimization parameters under the condition of ensuring that the user coverage perception is not changed when the service is idle, so that the overall energy efficiency level of the base station is improved.

The invention discloses a method for designing a vehicle on the basis of a wheel system structure, in order to solve the problems of power wasting of a driven wheel, power lacking of a driving wheel and surplus power configuration of the vehicle caused by equal radius of the present wheel system. The method for designing the vehicle on the basis of the wheel system structure comprises the following steps: 1) primarily setting a load wheel radius and a driving force according to a rolling resistance balance formula of the driven wheel: Fp1=Fz; 2) drawing a load wheel radius r1 according to a ground braking force formula of the wheel: Fxb=Tu / r, and checking if a braking torque of the vehicle is safe and reliable; 3) confirming a driving force required by the vehicle with a load wheel structure according to the formula: Ft=Ff+Fw+Fi; 4) arranging the driving wheel on one side or two sides of the load wheel on a driving part of the vehicle with the load wheel; and 5) confirming r2 according to a relationship that the radius r2 of the driving wheel is less than or equal to a half of the load wheel radius r1, and confirming the reasonable configuration of a power system of the vehicle. According to the method provided by the invention, the driving power of the vehicle is greatly enhanced under the condition that the original power of the vehicle is not increased, and the purpose of greatly saving energy is achieved.

The invention relates to a heat preservation graphene decorative sheet in a building outer wall and a production flow thereof. The graphene decorative sheet comprises an aluminum-magnesium alloy hardness layer (3) used as a basic layer, a decorative layer (2) is composited onto the outer surface of the aluminum-magnesium alloy hardness layer (3), a nano ultraviolet protective layer (1) is composited onto the outer surface of the decorative layer (2), a polyurethane heat preservation layer (4) is composited onto the inner surface of the aluminum-magnesium alloy hardness layer (3), an aluminum-foil anticorrosion layer (5) is composited onto the inner surface of the polyurethane heat preservation layer (4), the nano ultraviolet protective layer (1), the decorative layer (2), the aluminum-magnesium alloy hardness layer (3), the polyurethane heat preservation layer (4) and the aluminum-foil anticorrosion layer (5) are sequentially composited into a whole body from top to bottom, and the decorative layer (2) is a decorative film or a coating. Compared with the prior art, the heat preservation graphene decorative sheet is not only good in heat preservation effect, energy-saving, environment-friendly and high in practicability, but also durable, long in service life and good in flame retardancy and corrosion resistance.

The invention belongs to the technical field of engine oil production, and particularly relates to an engine oil additive composition and a preparation method thereof. The engine oil additive composition is composed of the following components in parts by weight: 35-45 parts of base oil, 1-5 parts of a solid phase lubricant, 1-8 parts of an organic molybdenum compound, 25-40 parts of a diluent, 10-15 parts of a cleaning dispersant, 1-5 parts of an antioxidant, and 1-5 parts of an anti-wear agent. The additive can effectively clean carbon deposit and oil sludge in the engine, and improves the service life of the engine; and the use of the engine oil additive not only can meet emission reduction requirements, but also can realize energy-saving goal, so that the engine oil additive has broadand potential application value.

The invention discloses a spray nozzle brick for an oxy-fuel combustion spray gun, a manufacturing method, the oxy-fuel combustion spray gun and a glass melting furnace with the spray nozzle brick, glass and a firing method of the glass. The spray nozzle brick has the beneficial effect that a spraying opening has the advantages of wide fuel use range (capable of using natural gas, coke stove gas, heavy oil, coal tar and petroleum tar powder), sufficient combustion, large flame coverage surface, high flame blackness, less NOx generation amount, gradient combustion, adjusting of oxidizing and reduction atmospheres according to types of melting glasses and the like, the melting atmosphere of the glass melting furnace can be adjusted, and the oxy-fuel combustion and oxy-fuel combustion supporting technologies are favorable for being popularized and applied in the glass melting furnace.

An embodiment of the invention provides a dual-frequency communication based intelligent management method and system of weight measurement. The method mainly includes the steps: after a vehicle arrives at a positioning node area in a weight measurement area, a dual-frequency positioning communication device arranged on the vehicle receives a low-frequency signal transmitted by a dual-frequency positioning node device arranged on a positioning node, the dual-frequency positioning communication device transmits a high-frequency signal to a communication base station device, and after the fact that a weight measuring process of the vehicle at the positioning node is legal is determined according to stored information about the weight measuring process of the vehicle, the communication base station device informs the dual-frequency positioning node device of allowing the vehicle to finish the weight measuring process related to the positioning node. The method and the system according to the embodiment have the advantages that positioning and communication ranges can be flexibly set according to specific environments of weight measurement areas such as a grain depot, incorrect and missing pieces of positioning and communication data are effectively avoided, and interference among various communication signals can also be effectively avoided.

The invention relates to the technical field of thermal power generating unit heat supply, in particular to a multi-stage steam extraction back pressure type small steam turbine graded heat regeneration and heat supply system and method. The multi-stage steam extraction back pressure type small steam turbine graded heat regeneration and heat supply system comprises a small steam turbine, a graded heat regeneration system and a heat supply system, wherein the small steam turbine is used for dragging power equipment and provided with a steam inlet, a steam exhaust outlet and a plurality of steam extraction outlets, and the steam inlet is connected with an intermediate pressure cylinder of the main steam turbine; the graded regeneration system involves a condensate water pump, a front low-pressure heater and a plurality of low-pressure heaters which communicate in sequence; the heat supply system involves a heat supply network circulating water pump, a heat supply network condenser, a plurality of steam extraction heaters and a heat supply network heater which communicate in sequence; and the steam exhaust outlet is connected with the front low-pressure heater or the heat supply network condenser, and the steam extraction outlets are connected with the low-pressure heaters and the steam extraction heaters in a one-to-one correspondence mode correspondingly. The system not only provides dragging power for the power equipment, but also achieves heat supply in winter and heating of condensed water of a main steam turbine through regenerative heat in summer at the same time, and utilizes steam exhaust waste heat of the small steam turbine in a full cycle.

The invention relates to an intelligent adding control method for a PAC solution, wherein the intelligent adding control method comprises the steps: acquiring the water inlet flow Q1 of a flocculation basin, and presetting the adding amount Q2 of the PAC solution according to a target function; collecting water quality data in the flocculation basin in a preset period, and preprocessing the collected water quality data to obtain preprocessed data; according to the preprocessing data, establishing a multiple linear regression model about the water inlet flow Q1 of the flocculation basin and the addition amount Q2 of the PAC solution, and calculating a partial regression coefficient [theta]1 and a reaction coefficient [theta]2 of the multiple linear regression model to obtain a polynomial regression relational expression; collecting water quality data in the flocculation basin in the next preset period, and calculating the addition amount Q2 of the PAC solution in the next preset period according to the polynomial regression relational expression; and generating a PAC flow change curve to realize addition of the PAC solution. According to the invention, the real-time and precise addition of the PAC solution is realized by constructing the multiple linear regression model.

The invention discloses a method for preparing an anhydrous peroxide organic carboxylic acid solution. The method comprises the following steps: in the presence of a catalyst, oxidizing an organic carboxylic acid and organic solvent-containing mixed solution with hydrogen peroxide in a stirring reaction kettle with a rectifying tower; distilling the water carried by the hydrogen peroxide solution and water generated during reaction from the tower top through an azeotropic distillation manner, so as to obtain an organic solvent-containing peroxide carboxylic acid solution from the tower kettle, wherein the organic solvent-containing peroxide carboxylic acid solution is characterized by azeotropic distillation and dehydration; and condensing top gaseous azeotrope through a condenser, separating free water in a settling separation tank, entering an adsorption tower with an adsorbent so as to remove saturated water from the azeotrope solvent, and returning to the rectifying tower. According to the method, the adsorption tower is additionally arranged, the distillation time is shortened to 4-8 hours from original 18-24 hours once, the consumption of a great amount of vapor can also be saved, only 5-6 tonnage of vapor is needed to produce one tonnage of caprolactone during the preparation of peroxide carboxylic acid, the vapor can be saved by 50%, and the consumption of cooling water can also be decreased by more than 40%.

The invention discloses a water storage type independent layered heating water-heating device which comprises a heater and a layered heating heat-supply heat insulation water tank. The lower portion of the layered heating heat-supply heat insulation water tank is provided with a cold water inlet, the upper portion of the layered heating heat-supply heat insulation water tank is provided with a hot water outlet, the heater is communicated with the layered heating heat-supply heat insulation water tank through a hot water pipe and a cold water pipe, a water inlet of the hot water pipe is connected with a water outlet of the heater, a water outlet of the hot water pipe is arranged on the upper portion of the layered heating heat-supply heat insulation water tank, a water inlet of the cold water pipe is arranged at the bottom of the layered heating heat-supply heat insulation water tank, a water outlet of the cold water pipe is connected with a water inlet of the heater, the cold water pipe is provided with a water pump, at least three temperature sensors are arrange in the layered heating heat-supply heat insulation water tank at intervals in the height direction, and the heater, the water pump and every temperature sensor are electrically connected with a heating controller. The water storage type independent layered heating water-heating device can perform heating according to the hot water quantity needed by a user, mixed flow of water of different temperatures on the upper portion and the lower portion can be avoided, and the goal of energy saving is achieved.

The invention discloses a process control optimization energy conservation method for an intelligent optimization energy conservation system, and belongs to the technical field of energy management and energy conservation. The method mainly solves the problem that a technician is needed in an existing process control to analyze data of each process and to provide a specific management and controlmeasurement. The method is mainly characterized in that: 1, acquiring production data, energy consumption data and acquisition time data of each process; 2, obtaining a production-energy consumption curve of each process according to the production data and the energy consumption data of different times; 3, respectively calculating energy consumption values under different productions; when the ratio of energy consumption and production is the smallest, recording the production of a product and the production of each process, and the productions are the production values of each step when theenergy consumption is minimum; and 4, outputting the production control value of each process to compare with an actual production value acquired in real time, and prompting a deviation to guide an operation user to perform parameter control. The process control optimization energy conservation method for the intelligent optimization energy conservation system has a characteristic of enabling an energy monitoring and management system to automatically output process control energy conservation measurements, and is mainly used for the optimization energy conservation of a process control.

The invention discloses phase-change energy-storage temperature-regulating foam concrete and a preparation method thereof. The phase-change energy-storage temperature-regulating foam concrete is prepared from 100-500 parts of phase-change energy-storage particles, 800-1000 parts of ordinary portland cement, 0-100 parts of quick-hardening cement, 0-300 parts of a filler, 5-10 parts of an accelerator, 5-10 parts of fibers, 0.5-1 part of a thickening time control agent, 2-6 parts of a foam stabilizer, 20-60 parts of a waterproof agent, 400-700 parts of water and 30-100 parts of a foaming agent. The preparation method comprises the steps of S1, preparing the phase-change energy-storage particles; S2, mixing the ordinary portland cement, the quick-hardening cement, the filler, the phase-changeenergy-storage particles, the accelerator, the fibers, the thickening time control agent, the foam stabilizer and the waterproof agent, adding water, mixing and stirring for 2-4 minutes, adding the foaming agent, stirring for 5-15 seconds, pouring into a mold, and standing and foaming for 1-24 hours; S3, after foaming is finished, conducting demolding and curing, and obtaining the phase-change energy-storage temperature-regulating foam concrete.

The invention belongs to an open type double-glass photoelectric curtain wall unit in the field of constructional engineering. An inner-layer curtain wall and an outer-layer curtain wall are included.A columnar air cavity is defined by the outer-layer curtain wall and the inner-layer curtain wall. The inner-layer curtain wall comprises an openable window. The outer-layer curtain wall comprises doubling hollow photovoltaic glass. A top metal grid is arranged on the top of the air cavity. The bottom of the air cavity is provided with a bottom metal grid on which people can get. An LED lamp strip is arranged at the bottom of the outer-layer curtain wall. A power connection box of the doubling hollow photovoltaic glass is in circuit connection with the LED lamp strip. The open type double-glass photoelectric curtain wall unit is efficient and capable of saving energy, and meanwhile the integral thermal performance of a building is improved; safety and reliability are achieved, and meanwhile overhauling and maintaining are convenient; and the appearance is attractive, and meanwhile the flexible and diverse outer facade effect is achieved.

The invention relates to an adjustable jet pump which comprises an upper connector, a pump body, a lower connector, a power liquid connector and a lower-pressure liquid connector. The adjustable jet pump is characterized by further comprising a bridge type channel movably connected between the pump body and the lower connector, two or more high-pressure flow channels and one low-pressure flow channel are formed in the bridge type channel in the axial direction, and nozzles different in size are arranged at the positions, at the outlet end of the bridge type channel, of the high-pressure flow channels. A valve rod is further arranged in the lower connector, one end of the valve rod is connected with a power liquid flow channel of the lower connector, and the other end of the valve rod is in contact with the end face of the bridge type channel in an abutting mode. One of the nozzles is communicated with an inlet of the pump body by rotating the bridge type channel, and meanwhile the inlet ends of the high-pressure flow channels where the nozzles are located are communicated with the valve rod. The inlet end of the low-pressure flow channel of the bridge type channel is communicated with a low-pressure liquid flow channel of the lower connector all the time. The adjustable jet pump can meet the requirement for the nozzle size in different conditions, the working procedure is simplified to a certain extent, and the working efficiency is improved.